FOR_EACH_IMM_USE_STMT (stmt, ui, name)
{
- if (gimple_assign_single_p (stmt))
+ int uses_ok = 0;
+ use_operand_p use_p;
+
+ if (is_gimple_debug (stmt))
+ continue;
+
+ /* Valid uses include dereferences on the lhs and the rhs. */
+ if (gimple_has_lhs (stmt))
{
- tree rhs = gimple_assign_rhs1 (stmt);
- if (rhs == name)
- ret = true;
- else if (TREE_CODE (rhs) == ADDR_EXPR)
- {
- do
- {
- rhs = TREE_OPERAND (rhs, 0);
- }
- while (handled_component_p (rhs));
- if (INDIRECT_REF_P (rhs) && TREE_OPERAND (rhs, 0) == name)
- ret = true;
- }
+ tree lhs = gimple_get_lhs (stmt);
+ while (handled_component_p (lhs))
+ lhs = TREE_OPERAND (lhs, 0);
+ if (INDIRECT_REF_P (lhs)
+ && TREE_OPERAND (lhs, 0) == name)
+ uses_ok++;
}
- else if (gimple_code (stmt) == GIMPLE_RETURN)
+ if (gimple_assign_single_p (stmt))
{
- tree t = gimple_return_retval (stmt);
- if (t == name)
- ret = true;
+ tree rhs = gimple_assign_rhs1 (stmt);
+ while (handled_component_p (rhs))
+ rhs = TREE_OPERAND (rhs, 0);
+ if (INDIRECT_REF_P (rhs)
+ && TREE_OPERAND (rhs, 0) == name)
+ uses_ok++;
}
else if (is_gimple_call (stmt))
{
unsigned i;
- for (i = 0; i < gimple_call_num_args (stmt); i++)
+ for (i = 0; i < gimple_call_num_args (stmt); ++i)
{
tree arg = gimple_call_arg (stmt, i);
- if (arg == name)
- {
- ret = true;
- break;
- }
+ while (handled_component_p (arg))
+ arg = TREE_OPERAND (arg, 0);
+ if (INDIRECT_REF_P (arg)
+ && TREE_OPERAND (arg, 0) == name)
+ uses_ok++;
}
}
- else if (!is_gimple_debug (stmt))
+
+ /* If the number of valid uses does not match the number of
+ uses in this stmt there is an unhandled use. */
+ FOR_EACH_IMM_USE_ON_STMT (use_p, ui)
+ --uses_ok;
+
+ if (uses_ok != 0)
ret = true;
if (ret)